Figure 8. Graphic representation of photoactive yellow protein. CIS(D) region (layer 2) is colored in red. Hole (lower left graphic) and particle (lower right graphic) natural orbitals of the lowest singlet excited state of PYP. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.).

Figure 9. Graphic representation of DsRed (PDB ID: 1ZGO) in solid-ribbon fashion. The pigment moiety located at the center of barrel is drawn with spheres. Hole (lower left graphic) and particle (lower right graphic) natural orbitals of the excited state of interest.